1.1-1.2 and 3.1, due on September 1

1. (Difficult) The difference between code and cipher is still not very clear to me. If I understand correctly, in a code words are replaced by codewords, which depends on the structure of the message. In a cipher, the message is encrypted by an algorithm, which is not dependent on the structure of the message. The Prime Number Theorem was also new to me, so it took a little while to understand.

2. (Reflective) Section 3.1 was mostly review from Math 371, but I think that the concepts are important for review. Several proofs in the section I have seen several times, but needed to be familiarized with them again. The most interesting parts of the reading was the application of non-repudiation. I had never thought about how important that would be especially in purchases on the internet. There has to be a secure encryption so that Alice cannot claim that she did not buy a specific item online.